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What is the use of skin effects in the induction motor?

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What is the use of skin effects in the induction motor?

(a) it helps in improving the efficiency

(b) it helps in improving the stopping characteristics

(c) it helps in improving the starting characteristics

(d) it helps in improving the running characteristics

The question was asked during an interview.

Origin of the question is Losses and Efficiency in portion Three Phase Induction Motor of Design of Electrical Machines

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Right answer is (c) it helps in improving the starting characteristics

The explanation: The skin effect phenomenon is observed in stator and rotor windings in the induction motor. The effect may be used for improving starting characteristics.

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